"Roche Alum" is a word in ENGLISH
roche alum
ENGLISH
Definition:
A kind of alum occuring in small fragments; -- so called
from Rocca, in Syria, whence alum is said to have been obtained; --
also called rock alum.
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alunogen
ENGLISH
A white fibrous mineral frequently found on the walls of mines and quarries, chiefly hydrous sulphate of alumina; -- also …
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